Amyloid Deposition and Cognition in Older Adults: The Effects of Premorbid Intellect

作者：Duff Kevin^*; Foster Norman L; Dennett Kathryn; Hammers Dustin B; Zollinger Lauren V; Christian Paul E; Butterfield Regan I; Beardmore Britney E; Wang Angela Y; Morton Kathryn A; Hoffman John M

来源：Archives of Clinical Neuropsychology, 2013, 28(7): 665-671.

DOI：10.1093/arclin/act047

• Amyloid
• Neuroimaging
• Neuropsychology
• Alzheimers disease
• Premorbid intellect

Although amyloid deposition remains a marker of the development of Alzheimers disease, results linking amyloid and cognition have been equivocal. Twenty-five community-dwelling non-demented older adults were examined with F-18-flutemetamol, an amyloid imaging agent, and a cognitive battery, including an estimate of premorbid intellect and the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). In the first model, F-18-flutemetamol uptake significantly correlated with the Delayed Memory Index of the RBANS (r .51, p .02) and premorbid intellect (r .43, p .03). In the second model, the relationship between F-18-flutemetamol and cognition was notably stronger when controlling for premorbid intellect (e.g., three of the five RBANS Indexes and its Total score significantly correlated with F-18-flutemetamol, rs .41 to .58). Associations were found between amyloid-binding F-18-flutemetamol and cognitive functioning in non-demented older adults. These associations were greatest with delayed memory and stronger when premorbid intellect was considered, suggesting that cognitive reserve partly compensates for the symptomatic expression of amyloid pathology in community-dwelling elderly.

• 出版日期2013-11